Monitoring applications are software tools designed to track and analyze the performance and health of various systems, networks, or applications. They help identify issues, optimize performance, and ensure that everything runs smoothly. By collecting data on metrics like response time, uptime, and resource usage, these applications provide valuable insights for IT teams. These tools can be used in various environments, including cloud services, on-premises servers, and mobile applications. Popular monitoring applications include Nagios, Prometheus, and New Relic. They often feature dashboards that visualize data, making it easier for users to understand system performance at a glance.